I’ve been asked many times if there was one thing, one moment, that led me to leave my job at a big health insurance corporation. Yes, there was, and it occurred five days before Christmas in 2007. That was when a beautiful 17-year-old girl named Nataline Sarkisyan passed away, days after the company I worked for refused to pay for a liver transplant that her doctors believed would save her life. A few days after Nataline’s death, I turned in my notice.